Sonic GemS? Plural? No, it's Sonic CD and a bunch of worthless additions. One Gem in all.
Sonic Fighters is even worse, yes, I couldn't believe it, an absolutely garbage fighting game, keep button mashing and you'll finish the arcade mode in 15-20 minutes and be done with it. And a fighting game? Who wants to punch and kick sweet Amy Roe anyway? Okay, I'm sure there are some. But believe me, I did not feel bad punching the hell out of Peck and Bark, and I hope I'll never see them ever again in any other Sonic game. There's a reason this wasn't released in the US previous to this, it SUCKS. People who say Sonic The Hedgehog from 2006 is the worst Sonic game obviously never played Sonic Fighters. Sonic CD is THE reason, the only reason to get this collection, let's not fool ourselves. It's great, but not the best Sonic game as some claim it to be. The level design can sometimes be an absolute mess, but I get it, they want to have multiple routes to add replayability, and the ability to go into hyperspeed and telelport to a different level is a great addition. The animated cutscenes are awesome BTW. The music is pretty good, Sonic Boom, Sonic Boom, Sonic Boom. The boss fights suck though. I like Sonic CD, but I think it's a smidge overrated. Here's the thing, should I rate the collection pretty high only because it has Sonic CD and ignore the other games in it? Or rate the whole collection as a whole? I'm going for the latter, and if you really want to play Sonic CD, get it, but if you're thinking about getting it to play the other games, don't bother.